Recycling von Polyestern

Details

Veröffentlichungs-Nr.

EP4782493

Anmeldetag

22. Januar 2025

Veröffentlichung

29. Juli 2026

Rechtsraum

EP

Abstract

The present invention is related to a process for the preparation of a purified solution (PS) containing a polyester depolymerization product, said method comprising the steps of forming a blend comprising a waste stream (W) of polyester and at least one diol monomer HO-R<1>-OH (A), which is capable of reacting with the polyester, exposing the blend to conditions suitable for at least partial depolymerization of the polyester, mixing the obtained depolymerization solution with a cooling liquid (C) and removing thus solidified liquifying contaminant in solid form, so as to obtain the purified solution (PS) containing the polyester depolymerization product, wherein the cooling liquid (C) is pure diol monomer HO-R<1>-OH (A) that has been adjusted to the temperature T2, and the diol monomer HO-R<1>-OH (A) added to the waste stream (W) is provided as a portion of the purified solution (PS) containing the polyester depolymerization product. The present invention is also related to a process for the preparation of a polyester from said purified solution (PS), and to a device for performing said processes.

Anmelder

Firma

Polymetrix AG

Land

🇨🇭 Schweiz